2011 Mercedes-Benz CLS63 AMG Is Leaking Oil

Diagnosing Oil Leak Sources in Your 2011 Mercedes-Benz CLS63 AMG and Recommended Repair Solutions

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Reviewed by
Bo Fader
Written by RepairPal Car Genius
Updated January 14, 2025
0%
80% chance it's the
Oil System Components
0%
20% chance it's the
Engine Gaskets
The most common reasons a 2011 Mercedes-Benz CLS63 AMG is leaking oil are oil system component failure and leaking engine gaskets.
  • Oil System Components: A worn or damaged oil pump or filter can lead to low oil pressure, resulting in inadequate lubrication and potential engine damage.
  • Engine Gaskets: A worn or damaged engine gasket can lead to oil or coolant leaks, resulting in engine overheating or loss of lubrication.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a 2011 Mercedes-Benz CLS63 AMG is leaking oil?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

Oil pans don't wear out or break like other parts, they generally only need to be replaced because of external damage from an accident or an improperly tightened drain plug. The main symptom you will experience is an oil leak underneath the engine of your car. The oil that leaks from a damaged oil pan will range from dark brown to dark black. If the leak is large enough or occurs for long enough the oil level will be low enough to turn the oil pressure or low oil level warning light on.

The engine oil pressure warning light will come on if the engine oil pressure is low, or if the oil pressure sensor is faulty. In either case, engine power may be reduced significantly. The check engine light may also illuminate, and an on-board diagnostic (OBD) trouble code will be stored in the vehicle's computer.

What are the steps to diagnose and fix an oil leak in a 2011 Mercedes-Benz CLS63 AMG?

When tackling an oil leak in a 2011 Mercedes-Benz CLS63 AMG, it's essential to adopt a systematic diagnostic approach. Start by thoroughly cleaning the engine to eliminate any oil residue, which will help you pinpoint the leak's source more effectively. Once the area is clean, inspect common leak points such as the oil pan, valve cover gaskets, oil filter housing, and oil cooler lines. Look for visible signs of oil accumulation or damage. If you find loose bolts, tighten them, and if gaskets appear worn or damaged, consider replacing them with high-quality parts. After addressing any identified issues, monitor the vehicle closely for any new leaks to ensure that your repairs were successful. This method not only helps in effectively diagnosing the problem but also aids in maintaining the vehicle's overall performance.

What are the common causes of oil leaks in a 2011 Mercedes-Benz CLS63 AMG?

When diagnosing oil leaks in a 2011 Mercedes-Benz CLS63 AMG, it's essential to understand the common culprits that may be at play. One frequent issue is the degradation of valve cover gaskets, which can lead to noticeable oil seepage over time. Additionally, a faulty oil filter housing gasket can create leaks within the engine bay, making it crucial to inspect this area regularly. The oil pan gasket is another potential source of leaks, as wear and tear can cause oil to escape from the bottom of the engine. Furthermore, oil cooler seals may become brittle or damaged, resulting in leaks that can be challenging to detect without a thorough inspection. Lastly, a failing rear main seal can lead to significant oil loss at the back of the engine, which is often more difficult to access. Regular maintenance and timely inspections are vital for identifying these issues early, allowing DIY enthusiasts to address them before they escalate into more severe problems. If you notice any signs of oil leaks, consider checking these components to determine the source and take appropriate action.

How urgent is it to address the oil leak in my 2011 Mercedes-Benz CLS63 AMG?

Addressing an oil leak in your 2011 Mercedes-Benz CLS63 AMG is not just a matter of routine maintenance; it is a critical issue that demands immediate attention. Ignoring an oil leak can lead to a cascade of problems, including severe engine damage due to low oil levels, which are essential for lubrication and cooling. The performance of your vehicle can significantly decline, affecting acceleration and overall drivability. Moreover, the presence of oil on hot engine components poses a serious fire hazard, making it imperative to resolve the leak without delay. Additionally, oil leaks can have detrimental effects on the environment, contaminating soil and water sources. Therefore, it is crucial to act swiftly to mitigate these risks, ensuring both your safety and the longevity of your vehicle.

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